The Pinpoint Measuring Tool takes the guesswork out of shopping online for children\'s shoes. The measuring tool features a rotating stylus for easy use and works alongside the M&S Pinpoint app to create an accurate measurement of your childs feet, so you can order the correct size with confidence. With the guidance of the app place their foot on a piece of plain A4 paper and run the tool around it. Repeat with the other foot, scan the outlines using the app on your smartphone. Pinpoint works in UK sizes only. Size range is from UK 4 small to UK 9 large. This tool is not a toy, and is non-returnable. App is compatible on iOs and Android.